diff --git a/ChangeLog b/ChangeLog
index b0b2cbcf4..84c051eee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-09-03  Felix Zielcke  <fzielcke@z-51.de>
+
+	* INSTALL: Note that GNU Bison 2.3 or later is required.
+
 2009-09-03  Colin Watson  <cjwatson@ubuntu.com>
 
 	* kern/i386/pc/startup.S: Fix typo.
diff --git a/INSTALL b/INSTALL
index 6048b1d6e..65993657f 100644
--- a/INSTALL
+++ b/INSTALL
@@ -13,7 +13,7 @@ configuring the GRUB.
 
 * GCC 2.95 or later
 * GNU Make
-* GNU Bison
+* GNU Bison 2.3 or later
 * GNU binutils 2.9.1.0.23 or later
 * Other standard GNU/Unix tools
 * Ruby 1.6 or later